JPH06139624A - Disk processing method and disk manufacturing device - Google Patents

Abstract

PURPOSE:To increase a speed for processing by processing a part of the predetermined processing items for predetermined numbers of sheets of disks and processing cold disks after finishing the processing of the set sheets of disks. CONSTITUTION:The receiving base 4A of a disk inspection device 4 rotates at a constant speed, irradiates a disk with the light beam through a lens provided on a casing, reads the reflected light and performs a prescribed inspection. When this inspection is terminated, a fourth transfer means 5 is operated and the disk D on the disk receiving base 4A is transferred to an ejecting part 6. At the same time with the lapse of preset time, a stopping signal for disk supply is applied by one sheet to the fourth transfer means 5, a disk suction head 4B is descended, a cold disk D is mounted on the disk receiving base 4A in the empty state and a second inspection starting command is issued.

Description

Detailed Description of the Invention

The present invention relates to a compact disc,
The present invention relates to a method and apparatus for processing a disc such as an optical disc.

2. Description of the Related Art First, the main manufacturing process of a compact disc will be described. First, a disc substrate made of polycarbonate is injection-molded. At this time, the recorded data is already stored in the substrate as an array of pits on the surface of the disc substrate. Next, an aluminum film as a reflective film is formed on the surface of the disk substrate having the pits by sputtering or vapor deposition. The aluminum film serves as a reflection film that reflects the laser beam for reading data to the pickup of the disc player. After this, in order to prevent damage, corrosion and deterioration of the aluminum film,
A synthetic resin protective film is formed on the aluminum film by spin coating. The disk thus covered with the protective film of synthetic resin is sequentially inspected for predetermined inspection items. A production line in which such a manufacturing process is performed will be briefly described with reference to FIG. 4 for explaining the present invention. A disk substrate injection-molded by the injection molding machine 1 will be described above in the sputter deposition apparatus 2. An aluminum film is formed and then transferred to the spin coater 3. The spin coater 3 mainly spreads the synthetic resin coating material for forming a protective film on the disk substrate surface and the synthetic resin coating material supplied on the disk substrate surface by centrifugal force by high-speed rotation to spread a desired film thickness. The spin portion 3B forms a uniform protective film, and the coating film hardening accelerating portion 3C hardens the protective film by UV irradiation or the like. The disc with the protective film thus formed is sent to the disc inspection device 4. Now, the temperature of the injection-molded disk substrate is quite high, but in many conventional integrated production lines, the injection-molded disk substrate is subjected to the predetermined processing because the processing speed in each process is slow. It takes a considerable time to reach the inspection device 4 after it has been applied. Therefore, the temperature of each disk supplied to the inspection device 4 is low, and it is not desirable to inspect in a high temperature state. Even if there is, the inspection device 4 can automatically inspect each disk according to predetermined inspection items. However, in some new high-speed automatic production lines with a short processing time, since the temperature of each disk supplied to the disk inspection device 4 is still high, the disk is temporarily collected in a stacker or the like and cooled, and then the The stacker is carried to the inspection line and each disc is automatically inspected in sequence for all the predetermined inspection items.
Therefore, in this case, it is difficult to construct an integrated production line, and it takes as much time as that described above from the injection molding process until the final disc is obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to propose a processing method and a manufacturing apparatus for inspection, etc., which enable speeding up of an integrated automatic disk production line. There is.

In order to solve this problem, the present invention is directed to a processing method and a manufacturing apparatus for performing a predetermined process on a disk having a protective coating formed thereon, in which a predetermined number of disks are set in advance. A part of the determined processing items is processed, and for each set number of discs, one disc is held at a different position and cooled, and after the processing of the next set number of discs is finished, or after a set time, the disc is cooled. The disk is processed according to predetermined processing items.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 4. A disk D injection-molded by an injection molding machine 1 is formed with the above-mentioned aluminum film in a sputtering film forming apparatus 2, and then a spin coater 3 is used. Be transferred to. The disk D having the protective film formed by the spin coater 3 is sent to the disk inspection device 4. Although the order of the manufacturing process is not so different from the conventional one, the major difference is that the disk inspection apparatus 4 has a mechanism and a processing method that can be incorporated in the disk manufacturing line. As shown in FIG. 4, the disc D injection-molded by the injection molding machine 1 is placed at a predetermined position of the high speed spin coater 3. The disc D is placed on the disc receiving portions provided at four positions at regular intervals in the turntable 3A2 in the paint discharging portion 3A by the first transfer means 3A1 including a swivel arm having a suction mechanism at its tip. It Turntable 3A2
Is rotated 1/4 in the direction of the arrow, the disk D is in the second position
Is transferred to the sputtering film forming apparatus 2 by the transfer means 2A. The second transfer means 2A comprises a pair of swivel arms opened 180 °, and each swivel arm has a first transfer means 3A.
It is almost the same as No. 1. The disk D on which the reflective film has been formed by the sputter film forming apparatus 2 has the second transfer means 2A again.
Then, the paint is returned to the turntable 3A2, and the paint for forming a protective film is supplied from the paint discharge nozzle 3A3 at the next discharge position. The discharge nozzle 3A3 draws a small circle centered on the center point of the disk D stopped at the discharge position, and is approximately 1
While rotating, a certain amount of paint is supplied to the disk D.
However, the ejection nozzle 3A3 may be stopped at one point, and the disc D may be rotated almost once at the ejection position. The disk D to which the paint has been applied is transferred to the high speed spin section 3B2 by the third transfer means 3B1 of the spin section 3B at the next position. The third transfer means 3B1 is composed of a pair of swivel arms having a suction mechanism at the tip, and when one swivel arm sucks the disk D on the turntable 3A2, the other swivel arm moves the disk D of the high speed spin unit 3B2. Are simultaneously adsorbed, and each disk D is simultaneously transferred from one separate location to the other location. The high-speed spin unit 3B2 rotates the disk D at a high speed to uniformly disperse the paint supplied from the discharge nozzle 3A3 by a centrifugal force to form a thin uniform protective film on the disk surface. The disk D having the protective film thus formed is turned by the third transfer means 3B1 into the turntable 3C of the coating film hardening accelerating portion 3C.
1, the protective film is hardened when it passes under the ultraviolet irradiation device 3C2 by the rotation of the turntable 3C1. The disk D having the hardened protective film is placed on the disk pedestal 4A of the disk inspection device 4 as the processing device by the fourth transfer means 5. The fourth transfer means 5 has the same structure as the third transfer means 3B1. The disk cradle 4A of the disk inspection device 4 rotates at a constant speed,
At this time, the disc inspection device 4 irradiates the disc with a light beam through a lens provided in the housing and reads the reflected light to perform a predetermined inspection. This disk inspection device 4 is equipped with a disk suction head 4B directly above the disk pedestal 4A, and the disk suction head can be moved up and down as indicated by the arrow by a movable arm 4C supporting the disk suction head 4B. There is. The movable arm 4C is supported by the fixed arm 4D. This operation will be described with reference to FIG. 3 as well. The disk D supplied to the disk receiving unit 4A of the disk inspection device 4 by the fourth transfer means 5 is counted by a counter (not shown), and the preset setting is made. If the number is less than or equal to the number of sheets, the first inspection start command is issued and the inspection is performed on a part of the predetermined inspection items. In this way, the temperature of the disks D sequentially supplied to the disk cradle 4A is still high, and therefore, if the inspection is performed in such a state, the inspection items that may affect the inspection result are not inspected. When this inspection is completed, the fourth transfer means 5 operates to transfer the disk D on the disk receiving base 4A to the ejecting section 6. When such a checking operation is repeated and the number of the disks D supplied to the disk receiving table 4A reaches the set number (for example, 50), the movable arm 4C operates to lower the disk suction head 4B,
The disk suction head 4B sucks the disk D on the disk pedestal 4A, and the movable arm 4C operates to raise the disk suction head 4B. The disc suction head 4B holds the sucked disc D at a fixed upper position. This holding time is a time (for example, 3 minutes) set in advance by a timer (not shown), and at the same time when the time elapses, a single disk supply stop signal is given to the fourth transfer means 5, and The disk suction head 4B descends, mounts the cooled disk D on the empty disk pedestal 4A, and issues a second inspection start command. Here, the disk D held at the upper position by the disk suction head 4B is cooled by the cooling device as a whole, or is cooled by a forced cooler such as a fan (not shown) if not. Is preferred. The reason why the cooling time of the disk D is set to a predetermined time is to keep the temperature of the disk D constant by keeping the cooling time of the disk D constant and to eliminate the variation of the inspection data due to the difference in temperature. Therefore, even when this manufacturing apparatus is stopped due to an accident or the like, the second inspection start command is issued with the lapse of the set time, and the predetermined inspection items are determined for the cold disk D placed on the disk pedestal 4A. It is supposed to inspect everything. When the inspection of the one disk D is completed, the first inspection start command is issued again, and the same operation as described above is repeated. Further, as described above, during the period in which the disc feeding operation is stopped by the disc feeding stop signal for the fourth feeding means 5, the injection molding machine 1 is stopped.
Other than the above, the other mechanisms temporarily stop for a time corresponding to the time for processing one disk D. Then, if the inspection result of one disc D on which all the inspection items have been performed is acceptable, the set number of discs D partially inspected before that are also determined to be acceptable. However, if the inspection result of one disc D on which all the inspection items have been performed is unsuccessful, the set number of discs D partially inspected before that are all determined to be unsuccessful. Disc D after inspection
Are placed on the disk stand 6A of the ejecting section 6 by the transfer means 5, and the acceptable products are accumulated on the stack pole 6D on the ejecting conveyor 6C by the ejecting arm 6B. Further, rejected products are accumulated on the stack pole 6E by the discharge arm 6B. The non-defective discs D accumulated on the stack pole 6D are conveyed by the discharge conveyor 6C and are discharged together with the stack pole 6D at the discharge position. In the above embodiment, one disk D before the partial inspection is moved to the movable arm 4C and the disk suction head every time the number of disks D supplied to the disk cradle 4A reaches the set number (for example, 50 disks). After the disk D was raised by 4B and the disk D was cooled, all the inspection items were inspected, but the disk D may fail the inspection items that can be inspected even in a high temperature state. In this case, since the above operation is completely wasted, every time the number of partially inspected disks D reaches the set number, one disk D after the partial inspection is raised by the movable arm 4C and the disk suction head 4B, After cooling the disk D, the above-mentioned problems can be solved by inspecting all the inspection items. In the above embodiment, the disc D once mounted on the disc receiving base 4A of the disc inspection device 4 is moved upward and held upward. In this method, timing and control with other mechanisms are simple. However, the movable arm 4C and the disk suction head 4B are required separately. In this respect, in another embodiment, as shown by a chain line in FIG. 4, a disc receiving position 7 is provided at an intermediate cooling position 7 between the delivery position 3C3 of the turntable 3C1 of the coating film curing portion 3C and the disc receiving base 4A of the disc inspection device 4. The base is arranged.
Delivery position 3 of turntable 3C1 of coating film curing portion 3C
Each time C3 reaches the set number, the one suction arm of the transfer means 5 places the set number of discs D on the disc cradle at the cooling position 7. At this time, the other suction arm of the transfer means 5 is connected to the disc holder 4 of the disc inspection device 4.
In the state where the disk D from A is held, the transfer means 5
Is further rotated, and when the other suction arm reaches the disk holder 6A of the ejecting portion 6, the disk D is placed on the disk holder 6A. In this embodiment, it is necessary to control the adsorption of the pair of adsorption arms of the transfer means 5 separately, and to control the adsorption arm on the right side of the intermediate transfer means 5 in the drawing to stop at the cooling position 7. Since it can be performed only by the sequence control, it is advantageous in terms of cost, and one suction arm of the transfer means 5 transfers the set number of disks D to the cooling position 7 on the disk pedestal. By increasing the speed of the means 5, it is not necessary to temporarily stop the manufacturing process before that as in the above-mentioned embodiment, which is very advantageous on the production line.

As described above, according to the present invention, in the processing method and the manufacturing apparatus for performing the predetermined processing on the disk on which the protective film is formed, the predetermined number of disks is predetermined. A part of the processing items is processed, and for each set number of discs, one disc is held at a different position to be cooled, and after the processing of the next set number of discs is completed, or after a set time, the cooled discs are previously set. Since the processing is performed according to the determined processing items, it is possible to speed up the integrated automatic disk production line.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is a drawing for explaining an example of a disk inspection device used in an embodiment of the present invention.

FIG. 3 is a diagram for explaining an embodiment of the present invention.

FIG. 4 is a diagram for explaining an embodiment of the present invention.

[Explanation of symbols]

 1 ... Injection molding machine 2 ... Sputter film forming apparatus 2A, 3A1, 3B1, 5 ... Transfer means 3 ... Spin coater 3A ... Paint discharge part 3A2, 3C1 ...・ Turntable 3A3 ・ ・ ・ Ejection nozzle 3B ・ ・ ・ Spin part 3B2 ・ ・ ・ ・ High speed spin part 3C ・ ・ ・Device 4A ・ ・ ・ ・ Disk cradle 4B ・ ・ ・ ・ Disk suction head 4C ・ ・ ・ ・ Movable arm 6 ・ ・ ・ ・ Ejection part 6A ・ ・ ・ Disk rest 6D, 6E ・ ・ ・ ・ Stack pole 6B ・ ・・ ・ Discharging arm 6C ・ ・ ・ ・ Discharging conveyor 7 ・ ・ ・ ・ Cooling position D ・ ・ ・ ・ Disk

Claims (7)

[Claims] 1. A disk processing method for sequentially transferring a disk on which a protective film is formed to a predetermined position of a processing device to perform a predetermined processing, and a predetermined processing item for a predetermined set number of the disks. Do a part of
The set number of discs is held at a position different from the predetermined position of the processing device for a predetermined time, cooled, and then returned to the predetermined position of the processing device to determine the cooled disk in advance. A disk processing method characterized by processing according to a processing item. 2. A disk processing method for sequentially transferring a disk on which a protective film is formed to a processing device to perform a predetermined process, wherein a predetermined set number of the disk is partially processed for a predetermined number of the disks. Then, one disk next to the set number of disks is held at another position and cooled until the processing of the next set number of disks is completed, and after the processing of the next set number of disks is completed, the cooling is performed. A disk processing method, wherein the disk is processed according to a predetermined processing item. 3. A disk processing method for sequentially transferring a disk having a protective film formed thereon to a processing apparatus for processing, wherein a predetermined processing item is partially performed for a predetermined set number of disks, and each disk is processed. The quality of the disc is determined, and one disc determined to be good among the set number of discs is held in another position and cooled until the processing of the next set number of discs is completed, and the above-mentioned next A disk processing method, wherein the cooled disk is processed according to a predetermined processing item after processing of a set number of disks is completed or after a predetermined time has elapsed. 4. A protective film forming device for forming a protective film on a disk substrate, a processing device for processing a disk on which a protective film is formed, and a processing device for processing a disk on which the protective film is formed from the protective film forming device. A disk manufacturing apparatus having at least a transfer means for transferring the disk to the apparatus, and a transfer holding means for transferring a predetermined number of the disks from the protective film forming apparatus to the processing apparatus at a predetermined position of the processing apparatus. One of the disks placed on the disk is moved to another position and held, and the processing device excludes the one disk from the predetermined number of processing items except the one disk. The transfer means interrupts the transfer of the disk to the processing device for each set number of sheets, and temporarily stops the state in which the disk is not placed on the processing device. Disk manufacturing apparatus, wherein the one disk held by the transfer holding means at another position is returned to a predetermined position of the processing apparatus and the predetermined processing item is processed. . 5. A protective film forming apparatus for forming a protective film on a disk substrate, a processing apparatus for processing a disk on which a protective film is formed, and a processing apparatus for processing a disk on which the protective film is formed from the protective film forming apparatus. A disk manufacturing apparatus comprising at least a transfer means for transferring the disk to the apparatus, and each time the transfer means transfers a set number of the disks from the protective film forming apparatus to the processing apparatus, the transfer means transfers one disk Place the processor in a position different from the predetermined position,
After the processing device has performed a part of the predetermined processing items for the set number of disks, the transfer means transfers the one disk at the other position to a predetermined position of the processing device, A disk manufacturing apparatus, wherein a processing device performs processing on the predetermined processing item. 6. The disk processing method according to claim 1, wherein the processing is an inspection. 7. The disk manufacturing apparatus according to claim 4, wherein the processing is an inspection.